Electromagnetic Interference Pattern of Resonance Cones in the Far Field
Abstract
At large densities or large distances from the transmitting antenna it is observed that resonance cones, instead of being a single sharp peak, become spatially modulated by a multiperiod interference pattern; this interference pattern can dominate over the phasing imposed by a grill antenna. A simple theory shows that this effect occurs when ωperc>>1 and that it is caused by electromagnetic terms neglected in the electrostatic approximation.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 1980
- DOI:
- 10.1103/PhysRevLett.45.1407
- Bibcode:
- 1980PhRvL..45.1407B
- Keywords:
-
- Electromagnetic Interference;
- Electrostatic Waves;
- Far Fields;
- Plasma Resonance;
- Plasma-Electromagnetic Interaction;
- Tokamak Devices;
- Wave Excitation;
- Controlled Fusion;
- Electromagnetic Wave Transmission;
- Interferometry;
- Plasma Density;
- Plasma Diagnostics;
- Plasma Heating;
- Wave Dispersion;
- Plasma Physics;
- 52.40.Db;
- 52.35.Fp;
- 52.50.Gj;
- 52.40.Fd;
- Electromagnetic radiation interactions with plasma;
- Electrostatic waves and oscillations;
- Plasma heating by particle beams;
- Plasma interactions with antennas;
- plasma-filled waveguides